EVILNess needs algebra help hopefully for the last time

Toastburner B · 04-22-2011, 11:56 PM

I did that wrong. The formula I was using was for dilutions, not mixing of two solutions. Sorry, my bad.

I can help with question one, I think.

I had to do similar problems with my studies. My teacher taught us a very simple formula for it:

Concentration1 X Volume 1 = Concentration 2 X Volume 2 (C1XV1 = C2XV2)

So, in the case of this problem you know the concentration and volume you have for one, but only the concentration for the other, so

EDIT: I plugged in the wrong numbers. See my next post for the right numbers.

9 X V1 = 60 X 7

Simplified down to

9(V1) = 420

Just solve for V1:

V1 = 420/9

V1 = 42.67 mL

Just round it out to what decimal place you need.

04-22-2011, 11:56 PM	#4
Toastburner B Toasty has left the building Join Date: Jun 2004 Location: Hiding...because I don't want to die. Posts: 3,936	I did that wrong. The formula I was using was for dilutions, not mixing of two solutions. Sorry, my bad. I can help with question one, I think. I had to do similar problems with my studies. My teacher taught us a very simple formula for it: Concentration1 X Volume 1 = Concentration 2 X Volume 2 (C1XV1 = C2XV2) So, in the case of this problem you know the concentration and volume you have for one, but only the concentration for the other, so EDIT: I plugged in the wrong numbers. See my next post for the right numbers. 9 X V1 = 60 X 7 Simplified down to 9(V1) = 420 Just solve for V1: V1 = 420/9 V1 = 42.67 mL Just round it out to what decimal place you need. __________________ I came, I saw, I got team-killed. A lot. Last edited by Toastburner B; 04-23-2011 at 01:25 AM.